You can’t run during your period. During menstruation, due to the loss of menstrual blood, it will easily lead to dizziness, weakness and limb weakness. When running, the oxygen consumption of the brain increases, which will cause ischemia and hypoxia and aggravate the symptoms, and in serious cases, fainting will occur. Most of the 2-3 days before menstruation, there will be soreness and swelling at the bottom of the waist and lower abdomen. During running, it will cause the uterus to drop and the pain will become more powerful, which is not conducive to the recovery of the body. It is important to take more rest, drink more warm water, reduce work, avoid strenuous exercise and heavy physical activities. Eat lightly, do not eat chili, hot pot, or cold drinks. For fitness enthusiasts, try to avoid this period and take appropriate walks.